Check engine light on "97" T100

[MIKEGOUGH1]

My son and I just finished changing the oil & filter, air filter and spark plugs on his new 1997 T100. While changing the plugs, one of the vacuum lines came undone. It caused it to run poorly until we located it, now all is well with the exception of the check engine light now being on. How do I reset the light?
Thanks
Mike

[nhparrot]

Originally Posted by MIKEGOUGH1

My son and I just finished changing the oil & filter, air filter and spark plugs on his new 1997 T100. While changing the plugs, one of the vacuum lines came undone. It caused it to run poorly until we located it, now all is well with the exception of the check engine light now being on. How do I reset the light?
Thanks
Mike

It should reset itself after 3 trips with no dtc's reported or you can disconnect the battery.

[tigpoz]

My '96 T-100 recently had the 'CheckEngine' light come on for the 1st time at ~120k miles. My experience might be interesting/helpful to others.
---- I stopped by the Toyota dealer and asked the guy at the service counter if they could check the code for me and see what the problem was. "Oh yes!" he said, "But you have to make an appointment and leave it with us. The code that your T-100's computer gives us will only point in the general area that we need to investigate to track down the problem. To diagnose the problem will be $65."
---- So I drove down the street to the auto parts store where the counter guy brought out the gizmo that reads the code and in 2 minutes had a print out for me for free that said "PO136 02 Sensor Bank 1 Sensor 2" which is the after-cat O2 sensor.
---- I went home and crawled under the truck and was disconnecting the plug-in for the O2 sensor when it occured to me that that booger had been down there under the truck in the open for 120k and maybe I should consider the possibility that, rather than a failed sensor, a corroded or dirty electrical connection had caused the problem.
---- So I cleaned up the connections, put it back together, disconnected the battery to clear the 'Check Engine' light, and sure enough, all was well. No 'check engine' light. Nice!
---- I think the experience at the dealers service dept. was especially interesting. I have to wonder--- If they would try to sell me that story about needing the $65 diagnosis, if I had bit would they then have tried to tell me I needed a new cat converter I didn't need? Or what?

Max
'96 T-100 4WD
'06 Tacoma 4WD

[sak]

Sorry to intrude on your dealership experience but I think I have to explain where the service writer's point of view.

First off, someone has to get paid to work. Unless you put the scan tool to pull the code, there is no real way of telling you whats wrong. So it is considered a diagnose time of $65. Thats a given. Go anywhere, even at independent grandma & granpa shops and they will sell a diagnoses fee up front before doing anything to it. Thats just how the business works.

Whatever they find, they should just sell you work for that. The only way to know if they are cheating you into paying for more is actually going through the process to see if they actaully will do it. Otherwise, there is no real way to know if that particular dealership practices falsifying information or not.

Anyhow, in your case as well as any DIY's case, luckily the local auto parts store offer's free code pulling via thier scan tool. This is because they want your business and hope and pray to god that you will buy the broken parts from them when you know what the code is.

Moreover, they assumption is that you will not know exactly how to fix it so you will end up buying part after part until you get it right. So in return, they will get your business (a lot of it) when its all said and done.

Just wanted to make some clarification so everyone knows how the system works.

[loytotoy]

As it happened to me the check engine light was fixed by replacing the 02 sensor on the exhaust. You probably want them to check the code because it aint cheap.